Working principle and performance characteristics of high pressure water mist fire truck

The small fire truck has a function of high-pressure water mist, which is mainly realized by the high-pressure water mist fire extinguishing system. This function is mainly because the spray droplet diameter is very small. For the same volume of water, its total surface area increases sharply, which can quickly absorb a large amount of heat and quickly reduce the temperature of the fire site. The fire extinguishing water consumption is only 1% of that of the traditional fire gun, and the fire extinguishing efficiency is 100 ~ 200 times that of the traditional fire gun. After absorbing heat, the high-pressure water mist is vaporized rapidly, which makes the volume expand sharply, usually more than 1700 times, thus reducing the oxygen concentration in the air, inhibiting the speed of oxidation reaction in combustion and asphyxiating. It can be seen that the fire extinguishing mechanism of high-pressure water mist is: first, cooling efficiency and absorbing heat; The second is asphyxiation, blocking the oxidation reaction. In addition, high-pressure water mist has a very superior efficiency of blocking heat radiation transfer, and can effectively block strong heat radiation.

2) Performance characteristics
① Use natural materials, water and air, without any pollution and damage.
② Less water consumption for fire extinguishing and less water stain residue.
③ Good electrical insulation performance and safe and reliable fire fighting of live equipment.
④ The water mist sprayed by the high-pressure water mist spray gun can greatly reduce the smoke content and toxicity in fire.
⑤ It has good fire extinguishing performance and wide application. It has better fire extinguishing performance for fires with fierce fire and fast spreading speed.
⑥ As a source of fire extinguishing agent, water is cheap.
⑦ The water storage tank is under normal pressure in standby state, without leakage problem, safe and reliable.
3) Scope of application
The fire truck equipped with the high-pressure water mist fire extinguishing system is suitable for fighting highway fires, gasoline fires, small electrical fires and other fires in public places. It shall not be used to fight fires that react with water and lead to combustion, explosion or a large number of harmful substances, fires that produce combustible gases with water, and fires that produce violent boiling flammable liquids with water.